to be met with at sea.  However, great storms are sometimes known to have driven single birds, nay, vast flocks, out to sea, which are obliged to seek for rest on board of ships at considerable distances from any land.  Captain Cook very obligingly communicated to me a fact which confirms the above assertion.  “Being on board of a ship between Norway and England, he met with a violent storm, during which a flight of several hundred birds covered the whole rigging of the ship.  Among numbers of small birds he observed several hawks, which lived very luxuriously by preying on those poor defenceless creatures.”—­G.F.

    To record incidents such as these, will not seem unimportant or
    injudicious to any one who knows the philosophical value of facts in
    the formation of just theories.—­E.

[7] “This morning, 5th September, I let down a thermometer, suspended in the middle of a strong wooden case, of such a construction as to let the water pass freely through it in its descent, but which shut close the instant it began to be drawn up.  By this means the thermometer was brought up in a body of water of the same heat with that it had been let down to.  The results were as above.”—­W.

This opportunity may be used for introducing the following table and remarks, which are certainly deserving attention.  “To ascertain the degree of warmth of the sea-water, at a certain depth, several experiments were made by us.  The thermometer made use of, was of Fahrenheit’s construction, made by Mr Ramsden, and furnished with an ivory scale; it was, on these occasions, always put into a cylindrical tin case, which had at each end a valve, admitting the water as long as the instrument was going down, and shutting while it was hauling up again.  The annexed table will at once shew the result of the experiments.

|  Degrees of Fahrenheit’s |         |Stay of  |Time in|
|        Thermometer.      |         |the      |hauling|
|--------------------------|         |Thermo-  |the    |
|        |On the  |        |Depth    |meter    |Thermo-|
| In the |Surface |At a    |in       |in the   |meter  |
| Air.   |of the  |certain |Fathoms. |Deep.    |up.    |
Date    |Latitude |        |Sea.    |Depth.  |         |         |       |
------------------------------------------------------------

--------------
1772
Sept. 5  00 deg.52’N.    75 deg.      74 deg.      66 deg.      85 F.     30’      27-1/2’

Sept.27. 24 deg.44’S. 72-1/2 70 deg. 68 deg. 80 F. 15’ 7’

Oct. 12. 34 deg.48’S. 60 deg. 59 deg. 58 deg. 100 F. 2O’ 6’

Dec. 15. 55 deg.00’S. 30-1/2 deg. 30 deg. 34 deg. 100 F. 17’ 5-1/2’

Dec. 23. 55 deg.26’S 33 deg. 32 deg. 34-1/2 deg. 100 F. 16’ 6-1/2’

1773